‘ARIYAH عارية
(1) A loan for the use of anything of which Qarz cannot be made: e.g. the loan of a horse is Ariyah; the loan of money is Qarz. (2) A gift of which the following in an example : – A person makes a gift to another of the dates of a palm-tree in his garden; but having afterwards some, doubt of the propriety of that person coming daily to his garden where his family usually are, and being at the same time unwilling to depart from his promise, or to retract his gift, he gives some of the dates that have already been pulled in lieu of those upon the tree. (Baillie’s Law of Sale. p. 300.)

Based on Hughes, Dictionary of Islam